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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Trajectory Question
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<blockquote data-quote="dwm" data-source="post: 88099" data-attributes="member: 1136"><p>I was shooting the 7MM RUM over the weekend and am confused by the results. I was shooting 140 grain Accubonds, published BC 0.485, at 3450 fps into sub 0.5 moa groups. </p><p></p><p>Saturday there was a 10 mph wind gusting to &gt; 15 mph coming straight toward the bench. I was hitting 1 inch over POA @100 yard and 1.5 inch over POA @200 yards. (still going up?? No way ???)</p><p></p><p>Today there was a 5-10 mph wind gusting to 15 mph coming toward the bench again. I was hitting 0.6 inch over POA @100 yards and 0.6 inch over POA @200 yards. (flat??) </p><p></p><p>I can't get any ballistic program to match this trajectory. </p><p></p><p>Is the wind causing the bullets to hit higher than normal at 200 yards? I thought headwinds caused the bullet to hit low.</p><p></p><p>What do you guys think?</p><p></p><p>Doug</p></blockquote><p></p>
[QUOTE="dwm, post: 88099, member: 1136"] I was shooting the 7MM RUM over the weekend and am confused by the results. I was shooting 140 grain Accubonds, published BC 0.485, at 3450 fps into sub 0.5 moa groups. Saturday there was a 10 mph wind gusting to > 15 mph coming straight toward the bench. I was hitting 1 inch over POA @100 yard and 1.5 inch over POA @200 yards. (still going up?? No way ???) Today there was a 5-10 mph wind gusting to 15 mph coming toward the bench again. I was hitting 0.6 inch over POA @100 yards and 0.6 inch over POA @200 yards. (flat??) I can't get any ballistic program to match this trajectory. Is the wind causing the bullets to hit higher than normal at 200 yards? I thought headwinds caused the bullet to hit low. What do you guys think? Doug [/QUOTE]
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Trajectory Question
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